Topic on User talk:Garrett
Hah looks like SA has 4 button prompts now. I forgot GInput had Wii addon. I just checked and there are generic JOY## prompts (text-based) + arrow button prompts in pcbuttons.txd in default SA. Dunno if that's enough to get the Generic value since that isn't covered in guide yet.
Also I've been just informed that Postal 2 has lot of button prompts too. Generic, DS3/4, 360/One and Wii ones (obv only 4 for wiki purposes but still)